J/$\psi$ suppression in In-In collisions at 158 GeV/nucleon
- Arnaldi, R.
- Averbeck, R.
- Banicz, K.
- Castor, J.
- Chaurand, B.
- Cicalo', C.
- Colla, A.
- Cortese, P.
- Damjanovic, S.
- David, A.
- DeFalco, A.
- Devaux, A.
- Drees, A.
- Ducroux, L.
- En'Yo, H.
- Ferretti, A.
- Floris, M.
- Forster, A.
- Force, P.
- Guettet, N.
- Guichard, A.
- Gulkanian, H.
- Heuser, J.
- Keil, M.
- Kluberg, L.
- Lourenco, C.
- Lozano, J.
- Manso, F.
- Masoni, A.
- Martins, P.
- Neves, A.
- Ohnishi, H.
- Oppedisano, C.
- Parracho, P.
- Pillot, Philippe
- Puddu, G.
- Radermacher, E.
- Ramalhete, P.
- Rosinsky, P.
- Scomparin, E.
- Seixas, J.
- Serci, S.
- Shahoyan, R.
- Sonderegger, P.
- Specht, H.J.
- Tieulent, R.
- Usai, G.
- Veenhof, R.
- Wohri, H.K.
DOIAbstract
8 pages, 3 figures, proceedings of Hard Probes 2006 International Conference - NA60The NA60 experiment has studied J/$\psi$ production in Indium-Indium collisions at 158 A$\cdot$GeV. In this paper we present an updated set of results obtained with the complete set of available statistics and an improved alignment of the vertex tracker. The centrality dependence of the J/$\psi$ production, obtained with an analysis technique based only on the J/$\psi$ sample, indicates that a suppression beyond that induced by nuclear absorption is present in In-In collisions, setting in at $\sim$80 participant nucleons. A first study of the systematic errors related with this measurement is discussed. We also present preliminary results on the J/$\psi$ azim...
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